<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<input type="button" value="点击">
	<input type="button" value="取消绑定">
</body>
</html>
<script src='jquery源码分析.js'></script>
<script>
	function show(){
		alert(this);
	};
	$('input:eq(0)').click(show);
	$('input:eq(1)').click(function(){
		$('input:eq(0)').off();
	});
</script>